
function hout=suptitle(str)
%SUPTITLE Puts a title above all subplots
% Amount of the figure window devoted to subplots
plotregion = .98;

% Y position of title in normalized coordinates
titleypos  = .97;

% Fontsize for supertitle
fs = get(gcf,'defaultaxesfontsize')+12;

% Fudge factor to adjust y spacing between subplots
fudge=1;

haold = gca;
figunits = get(gcf,'units');

% Get the (approximate) difference between full height (plot + title
% + xlabel) and bounding rectangle.

if (~strcmp(figunits,'pixels'))
    set(gcf,'units','pixels');
    pos = get(gcf,'position');
    set(gcf,'units',figunits);
else,
    pos = get(gcf,'position');
end
ff = (fs-4)*1.27*5/pos(4)*fudge;

% The 5 here reflects about 3 characters of height below
% an axis and 2 above. 1.27 is pixels per point.
% Determine the bounding rectange for all the plots
% h = findobj('Type','axes');
% findobj is a 4.2 thing.. if you don't have 4.2 comment out
% the next line and uncomment the following block.

h = findobj(gcf,'Type','axes');  % Change suggested by Stacy J. Hills

max_y=0; min_y=1;

oldtitle =0;
for i=1:length(h)
    if (~strcmp(get(h(i),'Tag'),'suptitle'))
        pos=get(h(i),'pos');
        if (pos(2) < min_y), min_y=pos(2)-ff/5*3;end
        if (pos(4)+pos(2) > max_y), max_y=pos(4)+pos(2)+ff/5*2;end
    else
        oldtitle = h(i);
    end
end

if max_y > plotregion
    scale = (plotregion-min_y)/(max_y-min_y);
    for i=1:length(h)
        pos = get(h(i),'position');
        pos(2) = (pos(2)-min_y)*scale+min_y;
        pos(4) = pos(4)*scale-(1-scale)*ff/5*3;
        set(h(i),'position',pos);
    end
end

np = get(gcf,'nextplot');
set(gcf,'nextplot','add');
if (oldtitle)
    delete(oldtitle);
end
ha=axes('pos',[0 1 1 1],'visible','off','Tag','suptitle');
ht=text(.5,titleypos-1,str);set(ht,'horizontalalignment','center','fontsize',fs);
set(gcf,'nextplot',np);
axes(haold);
if nargout
    hout=ht;
end